KX-TG9125RU, KX-TGA910RU - Panasonic Telephone Service Manual (repair manual). Page 3

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1 Safety Precautions----------------------------------------------- 4

1.1. For Service Technicians --------------------------------- 4

2 Warning -------------------------------------------------------------- 4

2.1. Battery Caution--------------------------------------------- 4
2.2. About Lead Free Solder (Pbf: Pb free)--------------- 4

3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7

4.1. Block Diagram (Base Unit) ------------------------------ 7
4.2. Circuit Operation (Base Unit) --------------------------- 8
4.3. Block Diagram (Handset)-------------------------------11
4.4. Circuit Operation (Handset)----------------------------12
4.5. Circuit Operation (Charger Unit) ----------------------13
4.6. Signal Route -----------------------------------------------14

5 Location of Controls and Components ------------------16

5.1. Controls -----------------------------------------------------16

6 Installation Instructions ---------------------------------------17

6.1. Connections------------------------------------------------17
6.2. Battery-------------------------------------------------------17
6.3. Expanding your phone system ------------------------19

7 Operation Instructions-----------------------------------------20

7.1. Base Unit Settings----------------------------------------20
7.2. Handset Settings -----------------------------------------21
7.3. Registering a Handset to a Base Unit---------------22
7.4. Copying Phonebook Entries ---------------------------23
7.5. For Service Hint-------------------------------------------23

8 Service Mode -----------------------------------------------------24

8.1. Engineering Mode ----------------------------------------24
8.2. EEPROM Layout (Base Unit)--------------------------29
8.3. Flash Layout (Handset) ---------------------------------34
8.4. Copying Phonebook Items When Repairing-------37
8.5. How to Clear User Setting------------------------------39

9 Troubleshooting Guide ----------------------------------------40

9.1. Troubleshooting Flowchart -----------------------------40
9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit) ----------------------------------------------48

9.3. Troubleshooting by Symptom (Handset) -----------52
9.4. How to Replace the Flat Package IC----------------56
9.5. How to Replace the LLP (Leadless Leadframe

Package) IC------------------------------------------------58

10 Disassembly and Assembly Instructions ---------------60

10.1. Disassembly Instructions -------------------------------60
10.2. Assembly Instructions -----------------------------------64

11 Measurements and Adjustments---------------------------65

11.1. The Setting Method of JIG (Base Unit) -------------65
11.2. Adjustment Standard (Base Unit)---------------------67
11.3. Adjustment Standard (Charger Unit)-----------------68
11.4. The Setting Method of JIG (Handset) ---------------69
11.5. Adjustment Standard (Handset) ----------------------71
11.6. Things to Do after Replacing IC ----------------------72
11.7. RF Specification-------------------------------------------73
11.8. How to Check the Handset Speaker or

Receiver ----------------------------------------------------74

11.9. Frequency Table (MHz) ---------------------------------74

12 Schematic Diagram ---------------------------------------------75

12.1. For Schematic Diagram---------------------------------75
12.2. Schematic Diagram (Base Unit_Main) --------------76
12.3. Schematic Diagram (Base Unit_Operation) -------78
12.4. Schematic Diagram (Handset) ------------------------80

12.5. Schematic Diagram (Charger Unit)------------------ 82

13 Printed Circuit Board ------------------------------------------ 83

13.1. Circuit Board (Base Unit_Main) ---------------------- 83
13.2. Circuit Board (Base Unit_Operation)---------------- 85
13.3. Circuit Board (Handset) -------------------------------- 87
13.4. Circuit Board (Charger Unit)--------------------------- 89

14 Appendix Information of Schematic Diagram --------- 90

14.1. CPU Data (Base Unit) ---------------------------------- 90
14.2. CPU Data (Handset) ------------------------------------ 92
14.3. Terminal Guide of the ICs, Transistors and

Diodes ------------------------------------------------------ 95

15 Exploded View and Replacement Parts List ----------- 96

15.1. Cabinet and Electrical Parts (Base Unit) ----------- 96
15.2. Cabinet and Electrical Parts (Handset)------------- 97
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 98
15.4. Accessories and Packing Materials ----------------- 99
15.5. Replacement Parts List------------------------------- 101